Xiaoling's weight is 31.5kg, and Xiaoqiang's weight is 8.6kg less than twice Xiaoling's. How many kilograms does Xiaoqiang weigh?
小玲的体重是31.5kg，小强的体重比小玲的2倍少8.6kg，小强的体重有多少千克？
<gadget id="calculator">31.5 * 2</gadget>
<output>63</output>

<gadget id="calculator">63 - 8.6</gadget>
<output>54.4</output>

<result>54.4</result>