1) For multiplication and division, the final answer should have the same number of significant figures as the least number of significant figures in any of the values being multiplied or divided. So ...1) For multiplication and division, the final answer should have the same number of significant figures as the least number of significant figures in any of the values being multiplied or divided. So applying the rule for division, the final result should have the same number of significant figures as the least number in the division, which in this case is the three significant figures in 393 mm.