A square table with a side length of 60 cm is wrapped around a square table with a length of 260 cm, how many centimeters are left?
用一根长260厘米的绳子，把一张边长是60厘米的方桌面绕一周，还剩多少厘米？
<gadget id="calculator">60 * 4</gadget>
<output>240</output>

<gadget id="calculator">260 - 240</gadget>
<output>20</output>

<result>20</result>