Break 4000 into 1000 × 4 so you can divide step by step.

• 20000 ÷ 4000 = 20000 ÷ 1000 ÷ 4
• 20000 ÷ 1000 = 20
• 20 ÷ 4 = 5

Final Answer: 20000 ÷ 1000 ÷ 4 = 5