An 8-meter iron wire, cut (1/4) meter each time, after cutting 4 times, how many meters are left
一根8米的铁丝，每次截下(1/4)米，截4次以后，剩下的是多少米
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">(1/4) * 4</gadget>
<output>1</output>

<gadget id="calculator">8 - 1</gadget>
<output>7</output>

<result>7</result>