The problem presented in the image is:

$7.2 \times 0.21$

To solve this, multiply the numbers:

$7.2 \times 0.21 = 1.512$

Thus, the solution is 1.512.

Would you like further details or have any questions? Here are some related questions to expand on the topic:

1. How do you multiply decimal numbers with different numbers of decimal places?
2. What is the process for estimating products of decimal numbers?
3. How would you convert the result into a fraction and simplify it?
4. How does decimal multiplication compare to whole number multiplication?
5. What is the significance of the decimal places in the final answer?

Tip: When multiplying decimals, count the total number of decimal places in the factors to place the decimal point correctly in the product.