Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Parameter | EN57 | EN71 | EW58 |
| --- | --- | --- | --- |
| Top speed | 110 km/h | 110 km/h | 120 km/h |
| Power (at h) | 740 kW | 1480 kW | 1864 kW |
| Constant power | 608 kW | 1216 kW | 1648 kW |
| Top acceleration | 0,5 m/s² | 0,6 m/s² | 0,9 m/s² |
| Max. axle pressure | 14,3 t | 14,3 t | 13,0 t |
| Car weight | 57 + 2 x 34 t | 2 x 57 + 2 x 34 t | 42 + 2 x 52 t |
| Wheel diameter (driving/non driving) | 1000/940 mm | 1000/940 mm | 1000/920 mm |
| Car length (external + internal) | 20700 + 21570 mm | 20700 + 21570 mm | 21130 + 20940 mm |
| Places (seating/standing) | 212/468 | 288/624 | 212/352 |
| Number of cars in unit | 3 | 4 | 3 |
| Traction scheme (m-motor, d-motorman's cabin, n-no cabin/motor) | d-m-d | d-m-m-d | dm-n-dm |
| Number of doors per car per side | 2 | 2 | 3 |
Question:
how many cars in a unit will the en71 accommodate?
Answer:
4