The number of A is less than the number of B (1/4), and the number of B is 60. What is the number of A?
甲数比乙数少(1/4)，乙数60，甲数是多少．
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 - (1/4)</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">60 * (3/4)</gadget>
<output>45</output>

<result>45</result>