Think about the digit that should come at units place in the answer.
Multiply 7 and 3 together and put given number of zeroes after it
How many total zeros are in question?
Remember to start with ones column.
Multiply 315 and 10 together
How many zeros you need to put in front of the product if you are multiplying by 100.
Commutative means we can make the operation in any order.
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