(77609+427×209)÷236-589=
( 77609 + 427 × 209 ) : 236 - 589 = 118 1) 427 × 209 = 89 243 2) 77609 + 89 243 = 166 852 3) 166 852 : 236 = 707 4) 707 - 589 = 118