(2/5) of a number is 4 more than (1/4) of 40, find this number. (solution with equation)
一个数的(2/5)比40的(1/4)多4，求这个数．(用方程解答)
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">40 * (1/4)</gadget>
<output>10</output>

<gadget id="calculator">4 + 10</gadget>
<output>14</output>

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

<gadget id="calculator">14 / (2/5)</gadget>
<output>35</output>

<result>35</result>