Each car on a commuter can seat 114 passengers. if the train has 7 cars how many passengers can the train seat?

This is a case of use of multiplication operation.

This is, a train has 7 cars with 114 seat seat passengers, you could add up 114 seven times: 114 + 114 + 114 + 114 + 114 + 114 + 114, but instead you should use the multiplication which is a sum abreviated:

  114
  x  7

798

798

The answer would be a i think

20000 as first it increases by 2500 then by 5000 so next it will increase by 10000