25% of the number A is equal to 75% of the number B, the number B is 40, what is the number A?
甲数的25%等于乙数的75%，乙数是40，甲数是多少？
<gadget id="calculator">75 / 100</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">25 / 100</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">(3/4) / (1/4)</gadget>
<output>3</output>

<gadget id="calculator">40 * 3</gadget>
<output>120</output>

<result>120</result>