(3/5) of a number is 30, what is (3/8) of this number.
一个数的(3/5)是30，这个数的(3/8)是多少．
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">30 / (3/5)</gadget>
<output>50</output>

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

<gadget id="calculator">50 * (3/8)</gadget>
<output>75/4 = around 18.75</output>

<result>75/4 = around 18.75</result>