(3/4) of the number A is equal to (2/5) of the number B, the number A is 80, what is the number B.
甲数的(3/4)等于乙数的(2/5)，甲数是80，乙数是多少．
<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">(3/4) / (2/5)</gadget>
<output>15/8 = around 1.875</output>

<gadget id="calculator">80 * (15/8)</gadget>
<output>150</output>

<result>150</result>