Use a 23.5-meter rope to form a rectangle with a length of 8.3 meters and a width of 2.7 meters. How many meters of rope are left?
用一根23.5米的绳子围成一个长8.3米，宽2.7米的长方形．还剩下多少米绳子？
<gadget id="calculator">8.3 + 2.7</gadget>
<output>11</output>

<gadget id="calculator">11 * 2</gadget>
<output>22</output>

<gadget id="calculator">23.5 - 22</gadget>
<output>1.5</output>

<result>1.5</result>