* Nikkei rises above 9,700 to hit new seven-mth high * Exporters gain on yen fall to 9-month low vs dollar By Dominic Lau TOKYO, Feb 27 (Reuters) - The Nikkei share average rose to a fresh seven-month high on Monday, extending this month's gains of more than 10 percent, as exporters climbed after the yen continued to tumble against the against the dollar. Strength in the yen this year has helped batter Japanese exporters' earnings, which have also been hit by supply disruption