Xiaoqiang and his two good friends went to the Children's Paradise to play. If each ticket is 15 yuan, how much will they spend in total?
小强和自己的2个好朋友去儿童乐园游玩．如果每张门票15元，他们一共要用多少元．
<gadget id="calculator">1 + 2</gadget>
<output>3</output>

<gadget id="calculator">3 * 15</gadget>
<output>45</output>

<result>45</result>