Xiaoqiang and three good friends went to the children's playground to play. If each ticket is 28 yuan, how much will they spend in total?
小强和3个好朋友去儿童游乐场游玩．如果每张门票28元，他们一共要用多少元．
<gadget id="calculator">1 + 3</gadget>
<output>4</output>

<gadget id="calculator">28 * 4</gadget>
<output>112</output>

<result>112</result>