(3/4) of a number is 1.5 more than (1/4) of 30. Find this number? (solution by equation)
一个数的(3/4)比30的(1/4)多1.5，求这个数？(用方程解)
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">30 * (1/4)</gadget>
<output>15/2 = around 7.5</output>

<gadget id="calculator">(15/2) + 1.5</gadget>
<output>9</output>

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

<gadget id="calculator">9 / (3/4)</gadget>
<output>12</output>

<result>12</result>