The number of A is (7/2), and 75% of its (3/5) number of B is exactly equal. Find the second number.
甲数是(7/2)，它的(3/5)乙数的75%正好相等．求乙数．
<gadget id="calculator">7 / 2</gadget>
<output>7/2 = around 3.5</output>

<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">75 / 100</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">(3/5) / (3/4)</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">(7/2) * (4/5)</gadget>
<output>14/5 = around 2.8</output>

<result>14/5 = around 2.8</result>