It is known that A is a one-digit number, B is a two-digit number, and C is a three-digit number. When these three numbers are multiplied, the product is 2004. Find their sum.
已知A是一个一位数，B是一个两位数，C是一个三位数，这三个数相乘，积是2004，求它们的和．
<gadget id="calculator">1 + 12 + 167</gadget>
<output>180</output>

<result>180</result>