There were 120 children in Sunshine Kindergarten in 2005, and the number in 2010 doubled to 21. How many children were there in 2010?
阳光幼儿园2005年有儿童120人，2010年的人数比2005年增加了1倍多21人，2010年有儿童多少人．
<gadget id="calculator">1 + 1</gadget>
<output>2</output>

<gadget id="calculator">120 * 2</gadget>
<output>240</output>

<gadget id="calculator">240 + 21</gadget>
<output>261</output>

<result>261</result>