The school-run factory originally had 3 nail-making machines, which could make 24.3 kilograms per hour. Now we have added 4 sets of the same formulation machine, how many kilograms can be formulated in total per hour.
校办工厂原来有3台制钉机，每小时可以制订24.3千克．现在又增加了同样的制订机4台，每小时一共可以制订多少千克．
<gadget id="calculator">24.3 / 3</gadget>
<output>8.1</output>

<gadget id="calculator">3 + 4</gadget>
<output>7</output>

<gadget id="calculator">8.1 * 7</gadget>
<output>56.7</output>

<result>56.7</result>