The ratio of apple trees to pear trees planted on the mountain is 5:6, and there are 120 fewer apple trees than pear trees. How many apple trees are there?
山上种的苹果树与梨树的比是5：6，苹果树比梨树少120棵．苹果树有多少棵？
<gadget id="calculator">6 - 5</gadget>
<output>1</output>

<gadget id="calculator">120 / 1</gadget>
<output>120</output>

<gadget id="calculator">120 * 5</gadget>
<output>600</output>

<result>600</result>