31°56'÷3=10°38'40''22.36°-18°22' =3°59' 36' ' 23°23'×3+107°43'÷5=69°69'+(105°+(2*60'+43'))/5=69°69'+21°+163*60''/5=90°69'+32'36''=91°9'+32'36''=91°41'36''