"61" Children's Day teacher went to the food store to buy candies. All the money brought by the teacher can buy 20 kilograms of chocolate, or 30 kilograms of assorted candy. The teacher made a calculation and decided to use only 3/5 of the money he brought to buy the two kinds of candies, and the quality of the two kinds is the same. How many kilograms of the two kinds of candies did Mr. Wang buy?
"六一"儿童节老师到食品商店去买糖果．老师带的钱全部买巧克力可买20千克，或者买30千克什锦糖．老师算了一下决定只用所带钱的(3/5)来买这两种糖，且两种质量相同，王老师买这两种糖共多少千克？
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">1 / 20</gadget>
<output>1/20 = around 0.05</output>

<gadget id="calculator">1 / 30</gadget>
<output>1/30 = around 0.033333</output>

<gadget id="calculator">(1/20) + (1/30)</gadget>
<output>1/12 = around 0.083333</output>

<gadget id="calculator">(3/5) / (1/12)</gadget>
<output>36/5 = around 7.2</output>

<gadget id="calculator">(36/5) + (36/5)</gadget>
<output>72/5 = around 14.4</output>

<result>72/5 = around 14.4</result>