A wall (rectangular) is 8 meters long and 35 decimeters high. When painting, 1500 grams of lime is needed per square meter, so how many kilograms of lime are needed for the whole wall?
一面墙(长方形)长8米，高35分米，粉刷时，每平方米需石灰1500克，那么整面墙共需要石灰多少千克？
<gadget id="calculator">35 / 10</gadget>
<output>7/2 = around 3.5</output>

<gadget id="calculator">1_500 / 1_000</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">8 * (7/2) * (3/2)</gadget>
<output>42</output>

<result>42</result>