all you do when multiplying a decimal by a positive multiple of 10 is move the decimal over to the right according to how many 0's there are. so if there is 1 zero, the answer would be 20.8 (which is the answer to this problem.) two 0's would mean that the decimal moves over 2 spaces to the right. so if the number was 100 rather than 10, then the answer would be 208. but for this particular problem, the answer is 20.8
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