(2/5) of number A is equal to (3/4) of number B. The number of A is (3/8), what is the number of B?
甲数的(2/5)与乙数的(3/4)相等．甲数是(3/8)，乙数是多少？
<gadget id="calculator">3 / 8</gadget>
<output>3/8 = around 0.375</output>

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

<gadget id="calculator">(3/8) * (2/5)</gadget>
<output>3/20 = around 0.15</output>

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

<gadget id="calculator">(3/20) / (3/4)</gadget>
<output>1/5 = around 0.2</output>

<result>1/5 = around 0.2</result>