Put the numerals in a written form. The thames is the longest river in england it is 334 (__________________) kilometres long. The lena is the longest river in Russia , it is 4,400 (______________) kilometres long.ben nevis is the highest mountain in the UK , it is 1,343 (_________) metres high. Elbrus is the highest mountain in Russia , it is 5,642 (_______________) metres high. lake loch ness is the deepest lake in the UK it is 230 (___________) metres deep . lake baikal is the deepest lake in Russia , it is 1,637 (_______) metres deep.