The school planned to plant 56 trees. The first time (3/7) was planted, and the second time (1/4) was the first time (1/4). How many trees were planted the second time?
学校计划栽56棵树，第一次栽了(3/7)，第二次栽的是第一次的(1/4)，第二次栽了多少棵？
<gadget id="calculator">3 / 7</gadget>
<output>3/7 = around 0.428571</output>

<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">56 * (3/7) * (1/4)</gadget>
<output>6</output>

<result>6</result>