The teacher’s house needs to decorate the balcony, and paste wall bricks on the left and right walls. The wall is 2m long and 3m high, and the wall is densely paved with 20cm long and 6cm wide wall bricks.
老师家要装修阳台，在左右两面墙上贴墙砖，墙长2m，高3m，用长20cm，宽6cm的墙砖密铺，每块砖0.5元，要铺满阳台，共需多少元．
<gadget id="calculator">2 * 100</gadget>
<output>200</output>

<gadget id="calculator">3 * 100</gadget>
<output>300</output>

<gadget id="calculator">20 * 6</gadget>
<output>120</output>

<gadget id="calculator">2 / 120</gadget>
<output>1/60 = around 0.016667</output>

<gadget id="calculator">200 * 300 * (1/60) * 0.5</gadget>
<output>500</output>

<result>500</result>