Calculation: 4113 × 34 + 5114 × 45 + 6115 × 56=______ .

Calculation: 4113 × 34 + 5114 × 45 + 6115 × 56=______ .

4113 × 34 + 5114 × 45 + 6115 × 56 = (40 + 43) × 34 + (50 + 54) × 45 + (60 + 65) × 56, = 40 × 34 + 43 × 34 + 50 × 45 + 54 × 45 + 60 × 56 + 65 × 56, = 30 + 1 + 40 + 1 + 50 + 1, = 123