(3/4) of a number is 15 more than (2/5) of 60, what is this number? (solution by equation)
一个数的(3/4)比60的(2/5)多15，这个数是多少？(用方程解)
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">60 * (2/5)</gadget>
<output>24</output>

<gadget id="calculator">24 + 15</gadget>
<output>39</output>

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

<gadget id="calculator">39 / (3/4)</gadget>
<output>52</output>

<result>52</result>