The IAF wants 42 squadrons each. With 18 aircrafts per squadron in average that means 756 Aircrafts
Now look at the IAF in 2030
270 Su-30MKI
120 Tejas mk1A
36 Rafales
67 Mig29s
50 Mirage2000
125 Jaguars
Total - 668 Aircrafts.
Which is 88 short of 756, which can be easily filled up with the Tejas...