The length of a wire is equal to its own (1/4) plus (1/2) meters, how many meters is this wire long?
一根铁丝的长度等于他本身的(1/4)加上(1/2)米，这根铁丝长多少米．
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<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">(1/2) / (3/4)</gadget>
<output>2/3 = around 0.666667</output>

<result>2/3 = around 0.666667</result>