(7/10) of the number A is the number B, the number A is 40, what is the number B.
甲数的(7/10)是乙数，甲数是40，乙数是多少．
<gadget id="calculator">7 / 10</gadget>
<output>7/10 = around 0.7</output>

<gadget id="calculator">40 * (7/10)</gadget>
<output>28</output>

<result>28</result>