The number of A is 60, the number of B is (4/5) of the number of A, what is the number of B.
甲数是60，乙数是甲数的(4/5)，乙数是多少．
<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">60 * (4/5)</gadget>
<output>48</output>

<result>48</result>