Grandpa Zhang ran around a square square with a side length of 125 meters, and the number of laps he ran was exactly 4 kilometers.
张爷爷绕边长是125米的正方形广场跑步，跑多少圈正好是4千米．
<gadget id="calculator">4 * 1_000</gadget>
<output>4_000</output>

<gadget id="calculator">125 * 4</gadget>
<output>500</output>

<gadget id="calculator">4_000 / 500</gadget>
<output>8</output>

<result>8</result>