The general affairs area went to buy desks and chairs. Mr. Wang brought a sum of money to buy all the desks, a total of 200 desks, and 300 chairs for all the chairs. How many sets of desks and chairs can you buy at most?
总务区去购买课桌椅，王老师带了一笔钱全部买桌子，共200张，全部买椅子可买300张，最多可以买多少套课桌椅子？
<gadget id="calculator">1 / 200</gadget>
<output>1/200 = around 0.005</output>

<gadget id="calculator">1 / 300</gadget>
<output>1/300 = around 0.003333</output>

<gadget id="calculator">(1/200) + (1/300)</gadget>
<output>1/120 = around 0.008333</output>

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

<result>120</result>