There are more apple trees than apricot trees in the orchard (3/7), exactly 39 more. How many almond trees are there in the orchard?
果园里苹果树的棵数比杏树多(3/7)，正好多39棵．果园里有杏树多少棵？
<gadget id="calculator">3 / 7</gadget>
<output>3/7 = around 0.428571</output>

<gadget id="calculator">39 / (3/7)</gadget>
<output>91</output>

<result>91</result>