An isosceles trapezoidal flower bed with a lower base of 4.8m, an upper base of 2.2m and a height of 4m. If 10 flowers are planted per square meter, how many flowers can be planted in this flower bed?
一个等腰梯形的花坛，下底4.8m，上底2.2m，高4m．如果每平方米种10棵花，这个花坛可种多少棵花？
<gadget id="calculator">4.8 + 2.2</gadget>
<output>7</output>

<gadget id="calculator">4 / 2</gadget>
<output>2</output>

<gadget id="calculator">7 * 2 * 10</gadget>
<output>140</output>

<result>140</result>