Please use the equation of X / 2 + X / 3 + X / 4 = 50 to make up a practical problem related to your own life

Please use the equation of X / 2 + X / 3 + X / 4 = 50 to make up a practical problem related to your own life

It takes two days to make a part, three days to make B part and four days to make C part. It took three people 50 days to make a part. Q: how many parts are there in this batch?