Answer:
72 grams
Step-by-step explanation:
If one marshmallow weighs 7.2 all you have to do is take that times 10, which would give you 72 grams as the answer.
Dividing two decimals means that we need to make the following math operation:

According to the following definition:

We can prove that our result is correct by multiplying the divisor by the quotient plus the reminder and verifying that this result matches the dividend. Also, we can use a calculator to prove that.