The product of multiplying two numbers is 3.240, and one of the multipliers has one decimal place, how many decimal places does the other multiplier have.
两个数相乘的积是3.240，其中一个乘数有一位小数，则另一个乘数有多少位小数．
<gadget id="calculator">3 - 1</gadget>
<output>2</output>

<result>2</result>