Explicație pas cu pas:
1+999×(10-24:3:2×9:6)+3=
1+999×(10-8:2×9:6)+3=
1+999×(10-4×9:6)+3=
1+999×(10-36:6)+3=
1+999×(10-6)+3=
1+999×4+3=
1+3996+3=
3997+3=4000
