The sum of A, B, and C is 720. It is known that A is twice that of B, and C is three times that of A. How much is C?
甲、乙、丙三数之和是720，已知甲是乙的2倍，丙是甲的3倍，丙是多少．
<gadget id="calculator">2 * 3</gadget>
<output>6</output>

<gadget id="calculator">1 + 2 + 6</gadget>
<output>9</output>

<gadget id="calculator">720 / 9</gadget>
<output>80</output>

<gadget id="calculator">2 * 80 * 3</gadget>
<output>480</output>

<result>480</result>