The price of a set of desks and chairs is 120 yuan, and the price of the chairs is (1/3) of the desks. How much less are chairs than desks?
一套课桌椅的价钱是120元，其中椅子的价钱是课桌的(1/3)．椅子比课桌少多少元？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 + (1/3)</gadget>
<output>4/3 = around 1.333333</output>

<gadget id="calculator">120 / (4/3)</gadget>
<output>90</output>

<gadget id="calculator">1 - (1/3)</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">90 * (2/3)</gadget>
<output>60</output>

<result>60</result>