Lele used plasticine to make a cylinder mold with a height of 12 cm and a bottom area of 3.5 square centimeters. Now she uses this piece of plasticine to make a cuboid model with a height of 7 cm. What is the bottom area of this cuboid?
乐乐用橡皮泥做了一个高是12厘米，底面积是3.5平方厘米的圆柱体模具，现在她用这块橡皮泥改做一个高是7厘米的长方体模型，这个长方体的底面积是多少？
<gadget id="calculator">12 / 7</gadget>
<output>12/7 = around 1.714286</output>

<gadget id="calculator">3.5 * (12/7)</gadget>
<output>6</output>

<result>6</result>