There are 16 sets of children's clothing in the store. Each set used to sell for 55 yuan, but now it only sells for 40 yuan. How much less are these children's clothes in total?
商店里有16套儿童服装，原来每套卖55元，现在每套只卖40元，这些儿童服装一共比原来少卖多少元？
<gadget id="calculator">55 * 16</gadget>
<output>880</output>

<gadget id="calculator">40 * 16</gadget>
<output>640</output>

<gadget id="calculator">880 - 640</gadget>
<output>240</output>

<result>240</result>