Lista con todos los números romanos desde el 300 hasta el 400 totalmente completa:
300 = CCC
301 = CCCI
302 = CCCII
303 = CCCIII
304 = CCCIV
305 = CCCV
306 = CCCVI
307 = CCCVII
308 = CCCVIII
309 = CCCIX
310 = CCCX
311 = CCCXI
312 = CCCXII
313 = CCCXIII
314 = CCCXIV
315 = CCCXV
316 = CCCXVI
317 = CCCXVII
318 = CCCXVIII
319 = CCCXIX
320 = CCCXX
321 = CCCXXI
322 = CCCXXII
323 = CCCXXIII
324 = CCCXXIV
325 = CCCXXV
326 = CCCXXVI
327 = CCCXXVII
328 = CCCXXVIII
329 = CCCXXIX
330 = CCCXXX
331 = CCCXXXI
332 = CCCXXXII
333 = CCCXXXIII
334 = CCCXXXIV
335 = CCCXXXV
336 = CCCXXXVI
337 = CCCXXXVII
338 = CCCXXXVIII
339 = CCCXXXIX
340 = CCCXL
341 = CCCXLI
342 = CCCXLII
343 = CCCXLIII
344 = CCCXLIV
345 = CCCXLV
346 = CCCXLVI
347 = CCCXLVII
348 = CCCXLVIII
349 = CCCXLIX
350 = CCCL
351 = CCCLI
352 = CCCLII
353 = CCCLIII
354 = CCCLIV
355 = CCCLV
356 = CCCLVI
357 = CCCLVII
358 = CCCLVIII
359 = CCCLIX
360 = CCCLX
361 = CCCLXI
362 = CCCLXII
363 = CCCLXIII
364 = CCCLXIV
365 = CCCLXV
366 = CCCLXVI
367 = CCCLXVII
368 = CCCLXVIII
369 = CCCLXIX
370 = CCCLXX
371 = CCCLXXI
372 = CCCLXXII
373 = CCCLXXIII
374 = CCCLXXIV
375 = CCCLXXV
376 = CCCLXXVI
377 = CCCLXXVII
378 = CCCLXXVIII
379 = CCCLXXIX
380 = CCCLXXX
381 = CCCLXXXI
382 = CCCLXXXII
383 = CCCLXXXIII
384 = CCCLXXXIV
385 = CCCLXXXV
386 = CCCLXXXVI
387 = CCCLXXXVII
388 = CCCLXXXVIII
389 = CCCLXXXIX
390 = CCCXC
391 = CCCXCI
392 = CCCXCII
393 = CCCXCIII
394 = CCCXCIV
395 = CCCXCV
396 = CCCXCVI
397 = CCCXCVII
398 = CCCXCVIII
399 = CCCXCIX
400 = CD
Muchas gracias por informarte a través del sitio : Todos los Números Romanos