cuboid goldfish bowl is 9 decimeters long, 5 decimeters wide, and 6 decimeters high. The glass on the left is accidentally broken. What is the area of the glass to be repaired?
一个长方体的金鱼缸，长是9分米，宽是5分米，高是6分米，不小心左面的玻璃被打坏了，修理时配上的玻璃的面积是多少．
<gadget id="calculator">6 * 5</gadget>
<output>30</output>

<result>30</result>