A 5-meter-long steel pipe, first cut off (1/2) of it, and then cut off (1/2) meter, how many meters are left at this time
一根5米长的钢管，先截下它的(1/2)，再截下(1/2)米，这时还剩下多少米
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">5 * (1/2)</gadget>
<output>5/2 = around 2.5</output>

<gadget id="calculator">5 - (5/2) - (1/2)</gadget>
<output>2</output>

<result>2</result>