Below is an instruction that describes a task. Write a response that appropriately completes the request in Chinese. Please answer in Chinese.

### Instruction:
 A罐有28颗弹珠。B罐比A罐多12颗弹珠。C罐比B罐多两倍的弹珠。一共有多少颗弹珠？


### Response:
 B罐有28 + 12 = <<28+12=40>>40颗弹珠。
C罐有2 x 40 = <<2*40=80>>80颗弹珠。
因此，一共有28 + 40 + 80 = <<28+40+80=148>>148颗弹珠。