A vegetable production base wants to wholesale a batch of vegetables to restaurants A, B, and C according to the ratio of 4:5:7. The total amount of vegetables wholesaled by restaurants A and B is 78 kg more than that of restaurant C. How many kilograms are there in total in this batch of vegetables?
某蔬菜生产基地要把一批蔬菜按4：5：7批发给甲、乙、丙三个餐厅，甲、乙两个餐厅批发的蔬菜总量比丙餐厅多78千克．这批蔬菜一共有多少千克？
<gadget id="calculator">4 + 5 + 7</gadget>
<output>16</output>

<gadget id="calculator">4 / 16</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">5 / 16</gadget>
<output>5/16 = around 0.3125</output>

<gadget id="calculator">7 / 16</gadget>
<output>7/16 = around 0.4375</output>

<gadget id="calculator">(5/16) - (7/16)</gadget>
<output>-1/8 = around -0.125</output>

<gadget id="calculator">(1/4) + (-1/8)</gadget>
<output>1/8 = around 0.125</output>

<gadget id="calculator">78 / (1/8)</gadget>
<output>624</output>

<result>624</result>