A number (4/5) is 9 more than 60% of 25, find this number. (solution by equation)
一个数的(4/5)比25的60%多9，求这个数．(用方程解)
<gadget id="calculator">60 / 100</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">25 * (3/5)</gadget>
<output>15</output>

<gadget id="calculator">15 + 9</gadget>
<output>24</output>

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

<gadget id="calculator">24 / (4/5)</gadget>
<output>30</output>

<result>30</result>