Xiaoling's mother gave her some money and asked her to buy school supplies by herself. Xiao Ling used 1/2 of the money to buy a stationery box priced at 10 yuan, and used the rest of the money to buy a schoolbag. How much is the schoolbag?
小玲的妈妈给了她一些钱，让她自己去买学习用品．小玲用这些钱的(1/2)买了一个售价10元的文具盒，又用剩余的钱买了一个书包，书包多少钱？
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">10 / (1/2)</gadget>
<output>20</output>

<gadget id="calculator">20 - 10</gadget>
<output>10</output>

<result>10</result>