The school bought 4 basketballs, the number of basketballs bought was half of that of volleyballs, and the number of footballs bought was 7 more than three times the total number of basketballs and volleyballs. How many footballs did the school buy?
学校买来篮球4个，买来篮球的数量是排球的一半，买来足球的数量比篮球、排球的总数的3倍多7个，学校买来多少个足球？
<gadget id="calculator">4 * 2</gadget>
<output>8</output>

<gadget id="calculator">8 + 4</gadget>
<output>12</output>

<gadget id="calculator">12 * 3</gadget>
<output>36</output>

<gadget id="calculator">36 + 7</gadget>
<output>43</output>

<result>43</result>