Recursive equation calculation: 17.8 + 6.3 △ (3.2 minus 1.6)

Recursive equation calculation: 17.8 + 6.3 △ (3.2 minus 1.6)

17.8+6.3÷（3.2-1.6）
=17.8+6.3÷1.6
≈17.8+3.94
≈21.74

43.3 * 76 + 111 * 19.2 + 455 * 7.6

43.3*76+111*19.2+455*7.6
=433*7.6+455*7.6+111*19.2
=7.6*(433+455)+111*19.2
=7.6*888+111*19.2
=111*(7.6*8+19.2)
=111*80
=8880

455 * 7.6 + 43.3 + 111 * 19.2 simple calculation

Original formula = (444 + 11) * 7.6 + (444-11) * 0.1 + 111 * 19.2
=111*4*7.6+11*7.6+111*4*0.1-11*0.1+111*19.2
=111（4*7.6+4*0.1+19.2）+11（7.6-0.1）
=111（4*7.6+4*0.1+19.2）+11*7.5
=111（4*7.6+4*0.1+4*4.8）+11*（8-0.5）
=111*4*（7.6+0.1+4.8）+11*8-11*0.5
=111*4*12.5+11*8-11*0.5
=111*50+11*8-11*0.5
=5550+88-5.5=5638-5.5=5632.5