An iron pipe is 16 meters long, (1/4) is used for the first time, and the remaining (1/2) is used for the second time, how many meters are used for the two times.
一根铁管长16米，第一次用去(1/4)，第二次用去剩下的(1/2)，两次一共用去多少米．
<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</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">(3/4) * (1/2)</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">(1/4) + (3/8)</gadget>
<output>5/8 = around 0.625</output>

<gadget id="calculator">16 * (5/8)</gadget>
<output>10</output>

<result>10</result>