Naughty mistakenly wrote 3.1 as 31 when calculating a multiplication, and the result was 72.3. What is the correct result?
淘气在计算一道乘法时因粗心错把3.1写成了31，结果得72.3，正确的结果是多少．
<gadget id="calculator">31 / 3.1</gadget>
<output>10</output>

<gadget id="calculator">72.3 / 10</gadget>
<output>7.23</output>

<result>7.23</result>