Heping Road Primary School plans to buy several sets of desks and chairs. With this money, you can buy 120 desks and 360 chairs. How many sets of desks and chairs can you buy with this money?
和平路小学打算购买几套课桌椅．这笔钱单买课桌能买120张，单买椅子能买360把，问这笔钱能买几套这样的课桌椅？
<gadget id="calculator">1 / 360</gadget>
<output>1/360 = around 0.002778</output>

<gadget id="calculator">1 / 120</gadget>
<output>1/120 = around 0.008333</output>

<gadget id="calculator">(1/360) + (1/120)</gadget>
<output>1/90 = around 0.011111</output>

<gadget id="calculator">1 / (1/90)</gadget>
<output>90</output>

<result>90</result>