2 times of a number is less than (3/4) (5/8), find this number. (solution by equation)
一个数的2倍比(3/4)少(5/8)，求这个数．(用方程解)
<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">5 / 8</gadget>
<output>5/8 = around 0.625</output>

<gadget id="calculator">(3/4) - (5/8)</gadget>
<output>1/8 = around 0.125</output>

<gadget id="calculator">(1/8) / 2</gadget>
<output>1/16 = around 0.0625</output>

<result>1/16 = around 0.0625</result>