Solve the equation: x-(1/4)x=3.6.
解方程：x-(1/4)x=3.6．
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 - (1/4)</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">3.6 / (3/4)</gadget>
<output>4.8</output>

<result>4.8</result>