75% of number A is as much as (2/5) of number B, number B is 120, what is number A?
甲数的75%与乙数的(2/5)一样多，乙数是120，甲数是多少．
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">75 / 100</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">(2/5) / (3/4)</gadget>
<output>8/15 = around 0.533333</output>

<gadget id="calculator">120 * (8/15)</gadget>
<output>64</output>

<result>64</result>