26     uint64_t accumulator;  in Multiply()  local
28     accumulator = (low_bits_ & kMask32) * multiplicand;  in Multiply()
29     uint32_t part = static_cast<uint32_t>(accumulator & kMask32);  in Multiply()
30     accumulator >>= 32;  in Multiply()
31     accumulator = accumulator + (low_bits_ >> 32) * multiplicand;  in Multiply()
32     low_bits_ = (accumulator << 32) + part;  in Multiply()
33     accumulator >>= 32;  in Multiply()
34     accumulator = accumulator + (high_bits_ & kMask32) * multiplicand;  in Multiply()
35     part = static_cast<uint32_t>(accumulator & kMask32);  in Multiply()
36     accumulator >>= 32;  in Multiply()
37     accumulator = accumulator + (high_bits_ >> 32) * multiplicand;  in Multiply()
38     high_bits_ = (accumulator << 32) + part;  in Multiply()
39     DCHECK((accumulator >> 32) == 0);  in Multiply()