To convert kilonewtons (kN) to tons of thrust, we can use the fact that 1 kN is approximately equal to 0.10197 tons of force.

For two engines with 110 kN each:

$$110 , ext{kN} imes 2 = 220 , ext{kN}$$$$220 , ext{kN} imes 0.10197 approx 22.43 , ext{tons}$$

So, two engines each producing 110 kN of thrust would collectively generate around 22.43 tons of thrust.