I remember downloading the source code for HL2 (via the official SDK) and somehow I counted the lines of code and the number of programmers and the number of da

I remember downloading the source code for HL2 (via the official SDK) and somehow I counted the lines of code and the number of programmers and the number of days it took to program and my calculations came to about 1000 lines per day per programmer. But I thought I must've made a mistake somewhere.