Determine the distance from Moscow to the North Pole using a scale?

So, you did not indicate the scale, so I will indicate these conditions myself. Let the scale be 1: 100,000,000. , which if translated, it turns out in 1 cm – 1000 km.
Further, on the map we measure the distance we need, that is, from Moscow to the North Pole with a ruler. It should be approximately 3.8 cm.
Now we translate this into kilometers: 3.8 × 1000 = 3800 km.
Answer: 3800 km