To process 4 / 7 × 5 / 6 × 6 / 24 × (5 / 12 + 7 / 8) 4 out of 7 × 5 out of 6 × 6 24 × (5 / 12 + 7 / 8) 1 / 9 × (120 × 18) × 1 / 24 6 / 11 × 7 / 8-5 / 12 × 6 / 11 11 / 4 × [7 / 11 (1 + 3 / 7)] Practical questions In the past three years, Populus huanglinensis has planted 600000 trees, of which three fifths are pine trees and one third are Cunninghamia lanceolata trees. How many Cunninghamia lanceolata trees are there? Father's monthly salary is 3200 yuan, mother's monthly salary is 2000 yuan, family living expenses are used every month, 3 / 10 of the salary, how much is the monthly family living expenses?

To process 4 / 7 × 5 / 6 × 6 / 24 × (5 / 12 + 7 / 8) 4 out of 7 × 5 out of 6 × 6 24 × (5 / 12 + 7 / 8) 1 / 9 × (120 × 18) × 1 / 24 6 / 11 × 7 / 8-5 / 12 × 6 / 11 11 / 4 × [7 / 11 (1 + 3 / 7)] Practical questions In the past three years, Populus huanglinensis has planted 600000 trees, of which three fifths are pine trees and one third are Cunninghamia lanceolata trees. How many Cunninghamia lanceolata trees are there? Father's monthly salary is 3200 yuan, mother's monthly salary is 2000 yuan, family living expenses are used every month, 3 / 10 of the salary, how much is the monthly family living expenses?

Cunninghamia lanceolata = 12
Living expenses = 1620