(44/25) ÷ (154/199.5) × 419.91 = ? – (11.11)³

570.11 ÷ 18.98 × 5.14 – 123.9 = √? 

5466.97 - 3245.01 + 1122.99 = ? + 2309.99

25.09 × (√15 + 19.83) = ? of 19.87 ÷ 4.03 

√? + √626 × 13.998 - 6.02 × 2.97 = 345.995 

What approximate value will come in place of question (?) in the following given expression? You are not expected to  calculate the exact value.

√3601 × √(224) ÷ √102 = ?

`sqrt(7.987 X 24.790 +199.991)`

What will come in place of the question mark (?) in the following series?

2, 4, 12, 60, 420, ?