A section of square steel is 2 meters long, and its cross section is a square with a side length of 10 cm. The square steel weighs 7.8 grams per cubic centimeter. How many kilograms does this section of square steel weigh?
一段方钢长2米，横截面是边长10厘米的正方形，每立方厘米方钢重7.8克，这段方钢重多少千克？
<gadget id="calculator">7.8 / 1_000</gadget>
<output>0.0078</output>

<gadget id="calculator">10 * 10 * 2 * 100 * 0.0078</gadget>
<output>156</output>

<result>156</result>