Question: when was zero first used in mathematical operations
[{'answer': 'By 1770 BC', 'provenance': [{'wikipedia_id': '34513', 'title': '0', 'start_paragraph_id': 10, 'start_character': 102, 'end_paragraph_id': 10, 'end_character': 112, 'bleu_score': 1.0, 'section': 'Section::::History.:Ancient Near East.\n'}]}, {'answer': '7th century', 'provenance': [{'wikipedia_id': '34513', 'title': '0', 'start_paragraph_id': 30, 'start_character': 397, 'end_paragraph_id': 30, 'end_character': 408, 'bleu_score': 1.0, 'section': 'Section::::History.:India.\n'}]}, {'answer': "in Brahmagupta 's Brahmasputha Siddhanta ( 7th century )"}, {'provenance': [{'wikipedia_id': '34513', 'title': '0', 'start_paragraph_id': 10, 'start_character': 0, 'end_paragraph_id': 10, 'end_character': 368, 'bleu_score': 0.968982777549629, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 4192331466182975265}, 'section': 'Section::::History.:Ancient Near East.\n'}]}, {'provenance': [{'wikipedia_id': '34513', 'title': '0', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 0, 'bleu_score': 1.0, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 4192331466182975265}, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '34513', 'title': '0', 'start_paragraph_id': 31, 'start_character': 0, 'end_paragraph_id': 31, 'end_character': 403, 'bleu_score': 0.9452425713908251, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 4192331466182975265}, 'section': 'Section::::History.:India.\n'}]}, {'provenance': [{'wikipedia_id': '34513', 'title': '0', 'section': 'Section::::History.:India.\n', 'start_paragraph_id': 30, 'end_paragraph_id': 30, 'meta': {'evidence_span': ['The concept of zero as a digit in the decimal place value notation was developed in India, presumably as early as during the Gupta period , with the oldest unambiguous evidence dating to the 7th\xa0century.', 'The concept of zero as a digit in the decimal place value notation was developed in India, presumably as early as during the Gupta period , with the oldest unambiguous evidence dating to the 7th\xa0century.']}}]}]