40 is the circular scale reading and least count is 0.001. it will be 0. There is a 40, 0.040. That is 0.40. That will be the circular scale reading and then linear scale reading is in this case 0. I think 0.5 millimeter means 0.5 centimeters and for 40 it has come 0. Oh that will be I think 0.00 40 40 into 0.001. it will be 0.04 0.04 no it is a 0. I have calculate so if I get circular scale reading circular scale reading this is a 40.
তাহলে 40 হলো সার্কুলার স্কেলের ডিভিশন এবং লিস্ট কাউন্ট হলো 0.001 সেন্টিমিটার।