/___/ prima lada
/___/___/___/ a doua lada
/___/___/___/+10 a treia lada
________________________
871kg
871-10=861 kg in mod egal in cele 3 lazi
7 parti egale
861:7=123 kg
Prima lada=123kg
A doua lada=123×3=369kg
A treia lada=123×3=+10=379kg
V; 123+369+379=871