https://file.aiquickdraw.com/mathbot/file/17260613939449qi8dubn.jpg

Let's solve the problem shown in the image:

The question is asking what day of the week it will be 400 days from today, given that today is **Rabu (Wednesday)**.

### Step-by-Step Solution:

1. **Days in a Week**: There are 7 days in a week. 
2. **Modulo Operation**: To find the day of the week 400 days from today, we need to calculate how many days remain after completing full weeks (which will just bring us back to the same day). This can be done using a modulo operation:
   
   \[
   400 \div 7 = 57 \text{ remainder } 1
   \]

3. **Interpretation**: The remainder of 1 means that 400 days from now will be 1 day after Wednesday, which is **Thursday (Kamis)**.

### Answer:
The correct answer is **D. Kamis**.

Would you like a more detailed breakdown or have any other questions?

Here are five related questions for practice:
1. What day of the week will it be 200 days from a Monday?
2. How would the answer change if there were 365 days (1 year) instead of 400 days?
3. What is the mathematical operation used to find the number of remaining days?
4. How many complete weeks fit into 500 days, and what day would that fall on starting from Friday?
5. If today is Thursday, what day will it be 1,000 days from today?

**Tip**: The modulo operation is a powerful tool for solving problems involving cycles, like days of the week or repeating sequences.

Sekarang hari Rabu, 400 hari yang akan datang adalah hari ....

Solve the problem of determining what day it will be 400 days from Wednesday using modular arithmetic. Learn key concepts in cycles and time calculations. Perfect for Grades 5-7 students.

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