There are 42 peach trees in the orchard, and every peach tree is an apple tree (6/7), how many apple trees are there?
果园里有桃树42棵，桃树的棵树是苹果树的(6/7)，苹果树有多少棵？
<gadget id="calculator">6 / 7</gadget>
<output>6/7 = around 0.857143</output>

<gadget id="calculator">42 / (6/7)</gadget>
<output>49</output>

<result>49</result>