(2/5) of a number is 64, what is (3/8) of this number.
一个数的(2/5)是64，这个数的(3/8)是多少．
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">64 / (2/5)</gadget>
<output>160</output>

<gadget id="calculator">3 / 8</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">160 * (3/8)</gadget>
<output>60</output>

<result>60</result>