number (3/4) is more (3/2) than its (2/5), find this number.
一个数的(3/4)比它的(2/5)多(3/2)，求这个数．
<gadget id="calculator">3 / 2</gadget>
<output>3/2 = around 1.5</output>

<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>7/20 = around 0.35</output>

<gadget id="calculator">(3/2) / (7/20)</gadget>
<output>30/7 = around 4.285714</output>

<result>30/7 = around 4.285714</result>