The school builds a cuboid pool. The inner wall of the pool is 2 meters long, 1.8 meters wide, and 1.5 meters high. The bottom and surrounding areas are painted with cement, and 2.5 kilograms of cement is used per square meter. How many kilograms of cement will be used in total?
学校修建一个长方体的水池，水池内壁长2米、宽1.8米，高1.5米，用水泥粉刷底部和四周，每平方米用水泥2.5千克．一共要用水泥多少千克？
<gadget id="calculator">2 * 1.8</gadget>
<output>3.6</output>

<gadget id="calculator">2 * 1.5</gadget>
<output>3</output>

<gadget id="calculator">1.5 * 1.8</gadget>
<output>2.7</output>

<gadget id="calculator">3 + 2.7</gadget>
<output>5.7</output>

<gadget id="calculator">5.7 * 2</gadget>
<output>11.4</output>

<gadget id="calculator">3.6 + 11.4</gadget>
<output>15</output>

<gadget id="calculator">15 * 2.5</gadget>
<output>37.5</output>

<result>37.5</result>